Isaac elie lecoultre



(No Model.) I. E. LECOULTRE.

INTERRUPTER FOR ELECTRIC CIRCUITS.

No. 399,057. Patented Mar. 5, 1889.

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ISAAC ELIE LECOULTRE, OF LAIBANNE, SWVITZERLAND.

INTERRUPTER FOR ELECTRIC CIRCUITS.

SPECIFICATION forming part of Letters Patent No. 399,057, dated March 5,1889. Application tiled September 21, 1887. Serial No. 250,287. (Nomodeh Patented in Belgium March 15, 1887, No. 76,612.

l l l l i l i l i Fig. is a cross- 1 section of the same when thecurrent is intcrrupted. Fig. 3 is a plan view of the ap paratus afterhaving withdrawn the cover B.

Fig. -l is a cross-section of the cover B, spring F, and piston C.

Fig. 5 is a vertical section of a modified interrupter of the same gen-I eral character. cover B of 5. Fig. 7 shows an inverted plan view ofsaid cover without piston C and spring F, and Fig. 8 an inverted planview of the cover with piston G and spring F. Fig. 9 is a plan view, andFig. 10 a cross-section, of plateA, and Fig. 11 is a plan view of springF.

A is a base-plate of insulating material, and

fixed to the wall or other supportby means of screws to and a Upon plateA there is fixed, by means of screws (1, a metallic segment, D, and ametallic segment, E, placed symmetrically to the first one and securedby means of screws 9.

Screw f of segment D and screw of scgment E act as binding-screws, towhich are affixed the two ends ofthe wires entering the apparatusthrough the hole A? Over the plate A is screwed a cover, B, ofnon-conducting material, through which passes the stem of the piston t,by which the electric contact between the plates D and E is established.A spring, F, as viewed edgewise, is in form a liat; loop or how havingfree ends similar to a horseshoe, as shown in Figs. -1- and ll, and thesome fixed at its central portion by means of one or more screws, Z1 tothe cover 1:). The two extremities of said spring bear against the sidesof the piston which is provided with a nonnuetallic or in- Fig. 6 is asection through the 1 sulating friction-ring, c, which is between thearms of the spring F when the piston C is moved from the position shownin Fig. l

into the position shown in Fig.

or, vice i versa, the said ring c prevents at the same 1;

time the displacing of piston C as long as? the latter is not acted uponby hand against the button-hcad The piston C has a conical headcorresponding to conoavities in the adjacent edges of the plates D andE.

In the modification shown by the Figs. 5 to 11 the segments D and E arefixed to the cover B, and spring F is provided with a projectionintended to be screwed to D. lhe segments D and E are provided withmetallic projections d and c, and the plate A has corresponding metallicbands (I and 6 to which are affixed the both ends of the electriccircuitwire. The cover B is placed over A, so as to have t? connected to d anda connected to 6*". The screws G and H are then turned so as to have (7pressed against (Z and 6 against In all cases the inner surfaces of theopposing free ends of the spring F adjacent to the conical head arerounding or concave, so as to take an even frictional bearing againstthe exterior surface of the conical head, and by the springs the conicalhead will be securely held in place either in contact with thecircuit-closing plates in completing the circuit; or away from them inbreaking the circuit, and the spring, being bent into a horseshoe form,is not liable to be broken, and the parts are strong and reliable.

I claim as my invention 1. The combination, with the base and cover ofinsulating material, the metallic segments upon the base, and a movablepiston, of a fiat, bent, or loop-shaped frictionspring secured at itscentral portion to the cover, and having its free opposing ends curvedto frictionally grasp and hold the piston, substantially as specified.

2. The combination, with the base and cover of insulating material, ofthe metallic segments D E upon the base, and the electric connections tothe said segments, a movable piston for making and breaking the electriccircuit, and a stem to the same passing through the insulated cover, anda but ton-head, 0*, a bent or loop friction-spring connected to thecover and having curved or concave opposing free ends engaging thepiston widthwise at opposite sides and acting to maintain the same inits various positions, and a ring, 0, connected to and acting to preventthe displaccmcntof the piston, substantially as set forth.

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